Progress on asn1 expiry

- Use MemBio and implement `Display` for Asn1Time

- Tweak doc for asn1 `not_before`, `not_after`

1 files changed, 6 insertions, 0 deletions

diff --git a/openssl/src/error.rs b/openssl/src/error.rs
index 5fa542c2..cc89b5db 100644
--- a/openssl/src/error.rs
+++ b/openssl/src/error.rs
@@ -54,6 +54,12 @@ impl From<ErrorStack> for io::Error {
     }
 }
 
+impl From<ErrorStack> for fmt::Error {
+    fn from(_: ErrorStack) -> fmt::Error {
+        fmt::Error
+    }
+}
+
 /// An error reported from OpenSSL.
 pub struct Error(c_ulong);